Heartburn relief. Suggestions?

Cyndi • I am married to a truly amazing man who I am proud to call my husband and best friend. We are expecting our 1st baby!
What food or drinks do not cause heartburn? I've had no problems with this until I hit 33 weeks and now it's so severe I can't sleep. This just miserable. I've tried milk and tums. They do not work! What else can I do? I'm going crazy!